Most smartphones allow you to silence all notifications except for those from your saved contacts. Report to the FIA: You can lodge a formal complaint at the FIA Cybercrime portal Use Spam Filters:

Under PECA, a conviction for cyberstalking can result in up to three years in prison, a fine of up to PKR 1 million (approx. $3,500), or both.

This is flawed logic. SMS bombing causes genuine tangible harm:

A: The PTA and law enforcement agencies are working to prevent the use of SMS bombers and protect telecom users, but more needs to be done to address this issue.

A: To protect yourself from SMS bombing, report incidents to your telecom company, block the number sending the messages, and consider using a text message filtering service.

Advanced tools run multiple message streams simultaneously to bypass network throttling and amplify the overload. The Risks in Pakistan

The PTA and cellular providers have started implementing "Rate Limiting" on APIs. For example, if a specific IP address or origin requests more than 5 OTPs for a single number in 60 seconds, the gateway temporarily blocks that request.

Pakistan's cybercrime law: boon or bane? | Heinrich Böll Stiftung